Projection system and light-guiding assembly thereof
View Patent ↗A projection system comprises a light source module and a light-guiding assembly. The light source module comprises a reflecting cover and a light source disposed in the reflecting cover to form a first beam with a first f-number. The light-guiding assembly comprises a body with an incident end and a lens disposed on the incident end. The first beam passes through the lens disposed on the incident end to form a second beam with a second f-number. The second f-number of the second beam is different from the first f-number of the first beam.
1. A projection system, comprising:
a reflective mask having an opening;
a light source disposed in the reflective mask, to form a first light beam reflected from the reflective mask and passing through the opening; and
a light-guiding assembly for receiving the first light beam to form a second light beam, the light-guiding assembly comprising:
a body having an incident end; and
a spherical main lens disposed on the incident end.
2. The projection system as claimed in claim 1 , wherein the first light beam comprises a first f-number and passes through the main lens to form the second light beam with a second f-number which is different from the first f-number.
3. The projection system as claimed in claim 2 , wherein the second f-number is larger than the first f-number.
4. A projection system comprising:
a reflective mask having an opening;
a light source disposed in the reflective mask, to form a first light beam reflected from the reflective mask and passing through the opening; and
a light-guiding assembly for receiving the first light beam to form a second light beam, the light-guiding assembly comprising:
a body having an incident end; and
a main lens disposed on the incident end,
wherein the first light beam comprises a first f-number and passes through the main lens to form the second light beam with a second f-number which is larger than the first f-number,
wherein the reflective mask further comprises an ellipsoidal reflective mask having a first focus, and the light source is disposed at the first focus.
5. The projection system as claimed in claim 4 , wherein the ellipsoidal reflective mask further comprises a second focus, and wherein the main lens comprises a convex lens disposed after the second focus.
6. A projection system comprising:
a reflective mask having an opening;
a light source disposed in the reflective mask, to form a first light beam reflected from the reflective mask and passing through the opening; and
a light-guiding assembly for receiving the first light beam to form a second light beam, the light-guiding assembly comprising:
a body having an incident end; and
a main lens disposed on the incident end,
wherein the first light beam comprises a first f-number and passes through the main lens to form the second light beam with a second f-number which is larger than the first f-number,
wherein the reflective mask further comprises a parabolic reflective mask having a first focus and the light source is disposed at the first focus, and the light source module further comprises a focus lens disposed on the opening of the parabolic reflective mask.
7. The projection system as claimed in claim 6 , wherein the focus lens further comprises a second focus, and wherein the main lens comprises a convex lens disposed after the second focus.
8. A light-guiding assembly for a projection system, to receive a first light beam and convert the first light beam into a second light beam, the light-guiding assembly comprising:
a body comprising an incident end; and
a spherical main lens disposed on the incident end.
9. The light-guiding assembly as claimed in claim 8 , wherein the first light beam comprises a first f-number and passes through the main lens to form the second light beam, with a second f-number which is different from the first f-number.
10. The light-guiding assembly as claimed in claim 9 , wherein the second f-number is larger than the first f-number.
11. The light-guiding assembly as claimed in claim 8 , wherein the main lens comprises a convex lens.